JLSEC-2026-392

A malicious server can serve excessive amounts of Set-Cookie: headers in a HTTP response to curl and curl 7.84.0 stores all of them. A sufficiently large amount of big cookies make subsequent HTTP requests to this, or other servers to which the cookies match, create requests that become larger th...

JLSEC-2026-397

When curl is used to retrieve and parse cookies from a HTTPS server, itaccepts cookies using control codes that when later are sent back to a HTTPserver might make the server return 400 responses. Effectively allowing a"sister site" to deny service to all siblings...

Curl is vulnerable to a denial-of-service (DoS) issue

Curl is vulnerable to a denial-of-service DoS issue due to how some HTTPs servers handle cookies that contain 'control-bytes' / 'control codes' byte values below 32. When curl sends cookies that contain these bytes to an HTTPs server, it may return a 400 response which effectively allows a "siste...

curl: Incorrect handling of control code characters in cookies

A vulnerability found in curl. This security flaw happens when curl is used to retrieve and parse cookies from an HTTPS server, where it accepts cookies using control codes byte values below 32, and also when cookies that contain such control codes are later sent back to an HTTPS server, possibly...

Huawei EulerOS: Security Advisory for curl (EulerOS-SA-2023-1164)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

When curl is used to retrieve and parse cookies from a HTTP(S) server itaccepts cookies using control codes that when later are sent back to a HTTPserver might make the server return 400 responses. Effectively allowing a"sister site" to deny service to all siblings.

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control code in cookie denial of service

When curl retrieves and parses cookies from an HTTPS server, it accepts cookies using control codes byte values below 32. When cookies that contain such control codes are later sent back to an HTTPS server, it might make the server return a 400 response. Effectively allowing a "sister site" to de...